Balancing Machines for Turbocharger Compressor Wheels

Interfacing with loading gantry and commercially available conveying equipment

Easy change over to other rotor types

Short cycle times

Most compact design

Easy movable as a single block

Titanium machining (option)

Range of application

Measurement and correction of dynamic unbalance of machined turbocharger
compressor wheels, use of the machine in mid- to large-volume
production. Fully automatic unbalance measurement and correction through
polar milling in two planes and with up to two correction steps.
Loading and unloading by gantry loader.

Design

Two-station machine with measuring and correction station and fully automatic operating cycle. Vertical balancing unit on a vibration-optimized machine frame, type-dependent, exchangeable precision air-bearing support for the compressor wheel, driven by a special drive plate with air jets adapted to the rotor diameter.
Measured data processing by measuring unit CAB 950.
Correction station with NC-controlled milling unit for unbalance correction by polar milling at the nose and back face of the compressor rotor.
Gantry loading system for linking the stations and connection to an in-feed and out-feed conveyor.

Sequence of operations

The work-piece is taken from the transfer conveyor and loaded into the machine

Automatic measuring run, brake to zero rpm

Remove the rotor from the measuring station and load it into the correction station

Clamp, index to the correction position for the 1st plane, advance the milling cutter to the milling position and control the milling cut. If the unbalance is large the cutter is additionally turned to increase the amount of material removed

Index and move the milling device to the correction position for 2nd plane, repeat the milling process and unclamp

Transfer the rotor to the measuring station and start the check run

Remove the work-piece and unload it to the out-feed conveyor

Measuring station with air bearings for highest measuring accuracy.

Unbalance correction at the hub and at the rear of the rotor is achieved by means of a numerically controlled milling unit.

The linear gantry loader system loads the machine stations and links it with the transfer conveyors of the production line.